When SiriusDecisions reported in 2015 that content marketers were wasting “tens of millions of dollars a year” on the 60% to 70% of content created by B2B marketing teams that never gets used, the industry took notice. The news spread quickly, and the stat appeared in blog posts and infographics all over the place. But what have we done about it since then? We simply can’t keep up with the growing demand for content if we’re creating everything net-new, and…